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R. S. LAWRENCE GARBURBTOR. No. 342,445. Patented May 25, 1886'.

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UNITED STATES PATENT 'QFFICE.

ROBERT S. LAIVRENOE, OF \VASHINGTON, DISTRICT OF COLUMBIA.

CARBURETOR.

SPECIFICATION forming part of Letters Patent No. 342,445, dated May 25, 1886.

Application filed January 20, 1886. Serial No. 189,177. No model.)

To all whom it may concern:

Be it known that I, ROBERT S. LAw'RENoE, a citizen of the United States,residin g at I'Vashington, in the District of Columbia, have invented a certain new and useful Improvement in Carburetors; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to mechanism for cleansing the distributingmus of carburetors of residuum from gasoline and of other deleterious substances.

Heretofore, so far as I am aware, no means have been devised for removing non-evaporating substances which gather in the bottoms of carburetor'pans which do not entail the necessity for perforating. the tank for the en trance of the clearance-pipes. Any perforation of the tank is highly objectionable, owing to the extreme liability of the escape of gasoline at the joint formed in such perfora tion, and therefore itis of the utmost importance that the tank should have the fewest possible openings.

By my invention, which is applicable only to such carburetors as are provided with a float-well, I can put a clearance-pipe in communication with a distributing-pan without perforating the tank for that purpose.

My invention consists in providing a clearance-pipe for each pan in the tank by placing the pipe on the inner side of the float-well, with its upper end located above the top of the reservoir, and its lower end passing out through an opening in the side of the well and communicating with the pan.

In the accompanying drawings,which show so much of the carburetor shown and described in my Letters Patent No. 340,221, dated April 20, 1886, as is necessary to illustrate my pressent invention, Figure l is a vertical section of the machine with the clearancepipes in place, the latter being in elevation. Fig. 2 is an elevation of the float. Fig. 3 is a crosssection of the fioat,taken on the line was, Fig. 2.

Referring to the drawings, A represents the tank of a carburetor; B, the reservoir; 0, the

float-well; D, the float; E, the float-rod; F, the float-well hood, and G the overflow distributing-pans.

H H represent the clearance-pipes, made of any suitable material, but preferably of copper, about one-half inch in diameter. Each of these pipes (there being one for each overflowpau) is so formed that its lower portion will extend along the bottom of the tank, up its side, overhang the pan, and dip down to near the bottom of the pan, the mouth of the pipe being provided with a wire screen, h, to prevent the entrance of excelsior or other mate rial with which the pan is packed. The pipe is banded,as at a, to the side of the tank. The other portion of the pipe passes through aslot in the lower end of the float-well, as shown, and extends upwardly along the inner side of the well, to which it is secured by solder, and out into the float-well hood.

In order that the float may work freely in the well when the pipes are in place, I groove its sides, as clearly shown in Figs. 2 and 3.

I have shown the outer end of each pipe screw-threaded, and one of them provided with a suction-pump, I; but as it is evident that other means may be employed to produce the requisite suction,'I do not wish to limit my invention in this particular.

\Vhile I have chosen to illustrate a machine Having described my invention what I claim as new and useful, and desire to secure by Letters Patent, is-

1. In a carburetor, the combination, with the tank and a iloatwvcll, and one or more distributingpans in said tank, of one or more clearance-pipes secured to the inner side of the well, the upper end of the pipe extending above the top of the reservoir, and the lower end passing out through an opening in the side through an opening in the side of the well and of the well and communicating with apan, for communicating with the inner side of a pan, the purpose set forth. for the purpose set forth.

2. In a carburetor, the combination, with In testinionywhereofI affix my signaturein 5 the tank and a float-well, and one or more dispresence of two witnesses.

tributingpans in said tank, of one or more T clearance-pipes secured to the inner side of ROBERT RENOE the well, the upper end of the pipe being 10- Vitnesses: cated in the float-well hood, and the lower E. HOFFMAN, IO end provided with a wire screen passing out G. WV. BALLOOH. 

